Concrete-mold.



E. A. EASTMAN.

CONCRETE MOLD. APPLICTION FILED APR. 2. 1915. 1,202,038. yPatented oct. 24,1916.

2 SHEETS-SHEET l.

. V MM E. A. EASIMANL CONCRETE MOLD.

APPLICATION. FILED APR. 2. |915.

Patented Oct. 24, 1916.

2 SHEETS-SHEET 2.

- plasticrnaterial.

ERNEST A. EASTMAN, or mirroir, omo.

Y coNomrrE-Mom). Y'

igreofefoas.

' To vall whomz't may concern."

Be it knovvn that I, ERNEST A. ASTMAN, citizen of the United States,.residing at Dayton, in the vcounty of Montgoinery AandState of (Ehio, have invented certain new anduse# fuln improvements 'in Conore"te- Mo'ld`s,V of.

which the' following is la specification. My 'intention relates to 'concrete bulding structures and nior'e partieularlyto Ia method of forining hollov7 Walls froni conerete` or other Vplastic inaterial and to fa Ycollapsible core therefor. 1 Y

The object 'of the invention is to provide Ineans for pouring or forming hollow or oharnbered valls vor other bodies of plastic inaterial by a series of courses or stages by means of :removable core which is Withdraw-n Vand reset upon each successive course or stage. n

A further object `of the invention is vto provide *an vimproved form of collapsible or removable cores adapted to forma hollow or recess having contracted Vor reduced oriiice through which the -core may be rernoved `ivhen inbollafpsed Condition, the purpose of such'reduced 'orifice beingk to forin afsuppor'tingledge upon which the core reist in its superposec'lposition.y

With the above primary and other incidental objects in view, as vill more vfully appear in the specification, the invention consists ofthe features of construction, the parts and combinations thereof, and 'the inode or method "o`f operation, or ntheir` equivalents, as hereinafter describedand 'set forth in the clainis.y i

Referring to the drawings,`Figure l is a vertical longitudinal sectional viev'v of a portion of 'a hollov ivall showing ldifferent stages of the operation. lFig. 2 is a .plan View of the fo'rlns and Wallslrovn in Fig. l.

' Fig., 3 is a vertical transverse sectional view of the 'structure and forins shoiv'n in Figs. l :and '2. Fig et is adetail perspective view of the collapsible core its distended or 'adjusted position. Fig. 5 is a top plan view thereof. F ig. 6 is a top plan vievvshovving the eii'tent f theorifioe in the finished prod uct and `the position'of a partially "collapsed core in 'relation therewith. Fig. Y is .a detail perspective viev'vslioiving the in ethod of setting the forni preparatory to pouring the Fig. 8-is a detail vievv of a inodifieation'.

nike sal-ts "ne 'nineteen-by sii-sine speemcanbnfof temi-gramm. aptent5e'1,0@e 245.1916, Y. Application ie'lsiiri'l 2, 1515.. seramo. v18h26.Y I i aeters 'of reference throughout .fthe several vieivs.

r`"At the presenttiine itis the custom to oons tructliollow Walls of concrete other 'plas V tic vI nate'rial by `means ofjholloworchaniberen lblocks laidone uponthe'other or by ai; f

Ineans of continuous V,forrns j eXte'ndin'g Y throughoiit the height of the charnber or recessin 4the structre.' The present inventionYV ernbodies 'the use ofsectional forrns 4which in'ay Vbe Withdrawn from thefini'shed portionbf :the Work 'and used again jand again for 'successive portions or stages..V The'construction and 'arrangement is such Vrthat at the-'pouring of each course or stage of fthe. lstructure a support is provided for the core or forin in its succeeding position. Means are likeivise provided `for connecting ythesuccessive recesses for chambers of the structure one with the other in a transverse direction in such lWay that the chambers will' be inter'- connnu-nioating, permitting la free eirc'ula-V tion of air throughout the entire structure.

Referringto E'thedraivi'ngs, l l are theslde `Walls or ekterio'r forrns 4as now commonly Located intermediate the side employed. Wa-lls in spaced relation both with 'the side Walls l andgin relatio'nlone with the rother isa series 'of Collapsiblercores or interi'ol fornis. Tires-e 'cores or interior forms com'- pri'se "side iva'lls Q 2 dividedinedially into two sections and hinged one to the other, as at Hinged to each of the side sections ,is an end section 4 Vconnected thereto at 5. Each (core therefore coniprises tivo separable iva'll Zand an 'end ivall et hinged thereto'.

To facilitate the Vireinoval 'of the sections the e0 unitsfeach unit consisting lof l.a jointed iside corners thereof are rounded,"as indicated at 6. The Vends lofthe units are preferably reinforced or faced with inetallie plates J7. To facilitate Vthe engageinent l 'and di'sengagei'nent of the sections byperniitting ythe kfree swinging of the end section 4, saidjei'nd sections are beveled,V as indicated at '8, and .the i de val-ls inay be bscill'ated i* 11o los 2 Y y, v v I 'i11,2o2,o3s

vbeen shown a simple formof locking means comprising an angle'plate 10 wliichslid ingly engages studs 4or, screws 11l upon the end sections andside walls; to hold the sections orunitsr oflthecore connected one tov theother. lTo hold thefside wallsQ' distended, space blocks` 12, asshown inv Fig. 7, may be insertedf` intermediate the walls of the core. ,"The "'iendf sections 4 of the'core are provided with openings V13 each of which y registers with the corresponding openingfof the adjacent core. v` Whenthe cores'are set "upfwithin theforms, cylindrical plugs or f auxiliary lforms 14, preferably slightly tapered as indicated in the lseveral figures, are insertedwithin the openings in the ends of the adjacent cores to forni `intercommunieating openingsfin the wallsbetween adjacent recessesor chambers. The top edges l ofthe walls 2 ofthe unit are beveled as indicated tnt15, "As before' stated, a vplurality of `,these 4cores are located iny spaced relation onefwith the'otherand with the side walls 1 l of the wform andare held in spaced relation by any suitable means. In Fig. 7 of the drawings` spaced blocks 16 are shown inserted between the Walls of the core and theside walls of the form whilerecessed bars 17 engage the adjacentfends of succeeding cores. i

`The collapsible cores, having been prop-'l erly located within the form and the form Vhaving been filled lwith plastic material to the height! of the cores or interior forms,

which is lallowed to set or partially harden,

- the cores or interior` forms are then col-y lapsed Iand withdrawn. The firstV step in the removal of the cores is the disengagement of the auxiliary forms 14 which is accomplished by reaching within one of the hollow coresor-formsand pushing or driving the auxiliary corela longitudinally into thene'xt succeeding hollow corel VThe auxiliary formsla having been removed, the

angle plates lO'are withdrawn thereby ,dis-

engaging the halves or units'ofthe cores or interior forms one from the other. The

end sections of the core or form may then be folded inward into parallel relation with the sides and theijoint or medial portionV of the side wallsmay be pulled inward to the angular position shown in Fig. 6. It will be found that the inclined or beveled upper edge of the coreor form has produced within the recess orchamber a beveled ledge 1S "on the oppesite sides ofthe chamber .or recess which contractor restrict the Vopening ofthe chamber or recess to a width less vthan that of the Yinterior dimenf sionsithereof. These lateral ledges or Aribs 18,'forrned by the vinclined orbeveled edges 15 'of the` core, con`stitute kysu'pports upon around the structure;

Vwhich the cores are set for thesucceeding course.. The wall or structure is thus produced in a series of steps or stages each one of a height corresponding to that of the cores and the same cores are used again and again for the successive steps or stages, each time being rested upon the supporting ledge formed by the preceding step or'stageV y rlhe vertical chambers or recesses formed by the use of the cores4 insuccessive positions communicate one with the otherv throughthc openings 19 produced by the auxiliary cores 14.,y In, employing the process herein described the builder will provide himself with-a sufficient number of collapsible cores oi' forms to extend in spaced relation once This will'befound farv less expensive than providing special forms or cores `corresponding with the height of the structure or wall as is now soA the case when anionolithic wall orV structurel isto be produced. y

llt is obvious that the particular shape and construction of the core or interior form may be modified to meet different conditions of use and the method of locking the same 'may be changed., An important feature,

however, is that of forming at each stage V hanging corners as at 2l in Fig. 8 by correspondingly shaping the cores. p Y

From theabove description it will be apparent that there is thus provided a device of the character described possessingy the particularv features of advantage before enumeratedz as desirable but which obviously is susceptible of modification in its form, proportion, detail construction, or arrangement of parts lwithout departing'from the principle involved or sacrificing any of its advantages. f

Vhile in order to comply with the statute the invention has been described in language more or less specific as to certain structural` features, it is to -be understood that the invention is not limited to any speciic details and the construction herein described comprises but`V one mode of putting the; invention into .effect and the invention plastic material, removable corelincluding side and end walls hinged one to another to Y fold inward uponvertical axes, said core having a top face of less extent than its bottom adapted to produce in the body a recess having a contracted opening upon the margins of which the said core is supported to form a similar recess in the next succeeding course or stage of the body.

2. In a form for a hollow body formed of plastic material, a removable core including side and end walls, the sidewalls being divided into sections hinged one to the other to fold inward, said core having its'upper edges offset in `relation with the exterior facesk of the walls of the core to produce in said body a recess having overhanging ledges upon which the said core is supported to form a similar recess in the succeeding course or stage of the body.

3. A core for a hollow body formed from Vplastic material comprising a plurality of wall sections'arranged in two series, the sections of each series being hinged one toy another, and the terminal sections of each seriesbeing detachably connected with those of the other series, the external configuration of thecore being such that projecting ledgesV are formed at each molding operation upon which the core 1s supported during the succeeding molding operation.

In a form for ya hollow body formed from plastic material, a series of hollow removable cores each having an opening in the wall below the top thereof registering with the corresponding openingof the succeeding core of the series, and a 'removable auxiliary core engaging the alined holes of twoadjacent cores when in spacedY relation, substantially as specified.

In a form for a Vhollow'body formed from plastic material, a series of cores removable from the recesses formed thereby in the body, and a'series of removable auxiliary cores extending intermediate the said first mentioned cores in a mid height position to form intercommunicating openings between adjacent recesses formed by the first mentioned cores. v

6. In a form for a hollow body formed from plastic material, a series of spaced hollow removable cores having alined openings below the top edges of their adjacent sides, and auxiliary coresengaging in said alined openings in hollow cores and removable therefrom to the interior of the removable hollow cores to form communica-ting openings in the walls intermediate succeeding recesses formed by the cores.

7. In a form for a hollow body formed from plastic material, a removable core comprising a box like structure, the top face of from plastic material, a removable core comprising a box-like structure openl on its opf posite sides, the opposite end wallsV being hinged to the opposite side walls, one end ywall to each side wall for inward folding movement, the side walls comprising Y two sections hinged one to the other to fold outward, holes in the end wall of the structure, and core members'to engage in the alined holes of succeeding core structures.

9. Ina form for a hollow body formed from plastic material, a removable core com-V prising a box like structure, the top face of which. is of less area than the base whereby said core will produce in the body of material a chamber having a contracted orifice, the side walls of which are medially Hexible and capable of being drawn inward or each toward the other at a mid length point to facilitate the removal of the core from the interior of the hollow body. j

l0. Ina form for hollow body formed from plastic materialVa. removable core comprising a box like structure, the side walls of which are'medially flexible and capable of being drawn inward or each toward the other at a mid length point to facilitate the removal of the core from the interior of the hollow body, the exterior faces of the sides being contouredto mold ledges on the interior of the hollow body on which the core may be supported during a succeeding molding operation.

ll. A form for producing a hollow structure of concrete or other plastic material including an interior form or core comprising a box-like structure, the side and end walls of which are foldable inward about vertical axes having its exterior face odset to produce upon the interior face of the recess formed in the structure by said core supporting ledges uponwhich the form or core may be y rested in producing a succeeding course of the structure.

In testimony whereof, I have hereunto set my hand this 27 day of March A. D. 1915.

ERNEST A. EASTM-AN. Witnesses:V

C. A. CRAIGHEAD, FRANK. L. WALKER.'

Comes of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

